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Numerical study of three-dimensional suspended sediment transport in waves and currents

机译：波浪和水流中三维悬浮泥沙运移的数值研究

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摘要

In the present work, a three-dimensional suspended sediment model (SED) is built. A three-dimensional hydrodynamic model (COHERENS) and a third-generation wave model (SWAN) are fully coupled through accounting for mutual influences between wave and current in them. SED is combined with the coupled model built up above. Damping function of suspended sediment on turbulence is introduced into COHERENS. Then a coupled hydrodynamic-sediment model COHERENS-SED incorporating mutual influences between wave and current is obtained. COHERENS-SED is adopted to simulate three-dimensional suspended sediment transport of Yellow River Delta with wave-current co-existing. The simulated tidal current velocities and suspended sediment concentration match well with field measurement data. The simulated significant wave height and wave period for a case with current's effects can give better agreement with measurement data than a case without current's effects. Numerical simulation results of COHERENS-SED are demonstrated to be reasonable though being compared with previous studies and field measurements [Wang, H., Yang, Z.S., Li, R., Zhang, J., Chang, R., 2001. Numerical modeling of the seabed morphology of the subaqueous Yellow River Delta. International Journal of Sediment Research 16(4), 486-498; Wang, H., 2002. 3-dimensional numerical simulation on the suspended sediment transport from the Huanghe to the Sea. Ph.D. Thesis, Ocean University of China, pp. 12-14 (in Chinese)].
机译：在目前的工作中，建立了三维悬浮泥沙模型（SED）。通过考虑波浪和电流之间的相互影响，将三维流体动力学模型（COHERENS）和第三代波浪模型（SWAN）完全耦合。 SED与上面建立的耦合模型结合在一起。将悬浮泥沙对湍流的阻尼功能引入了COHERENS。然后获得了结合了波浪和水流相互影响的耦合水动力沉积模型COHERENS-SED。采用COHERENS-SED软件模拟了黄河三角洲波浪-水流共存的三维悬浮泥沙运移过程。模拟的潮流速度和悬浮泥沙浓度与现场测量数据吻合良好。与没有电流影响的情况相比，对于有电流影响的情况，模拟的有效波高和波周期可以更好地与测量数据保持一致。尽管将COHERENS-SED的数值模拟结果与以前的研究和现场测量结果进行了比较，但还是被证明是合理的[Wang，H.，Yang，ZS，Li，R.，Zhang，J.，Chang，R.，2001。黄河三角洲海床形态的变化国际泥沙研究杂志16（4），486-498; Wang，H.，2002。从黄河到海洋的悬浮泥沙输运的三维数值模拟。博士中国海洋大学论文，第12-14页]。

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